He`s not "angsty and whiny", he`s more of an "angry young man" syndrome and frankly he had my favorite development out of any Gundam character. Amuro and Shinji were angsty and whiny.

Amuro was angsty? When did he ever second-guess himself or wonder if what he was doing was right? And even whiny is a bit of a stretch, unless you think crying over a lot of dear friends' deaths is whining.